subnet.im

AS11580Island Networks Ltd

JamaicaRegistryARIN

As of 10th November 2026, AS11580 (Island Networks Ltd), a network registered in Jamaica with ARIN, originates 9 IPv4 prefixes covering 4.6k addresses. By IPv4 address space that makes it the 16,463rd-largest of the 80,723 networks we see originating IPv4, and the 5th-largest of 10 in Jamaica. It is seen behind 2 upstream networks, most often AS23520 (Columbus Networks USA, Inc.) and AS30689 (FLOW). None of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 78% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

9

IPv6 prefixes

0

IPv4 addresses

4.6k

IPv6 /64s

0

Upstream graph

The networks AS11580 is seen behind, one and two hops out, drawn from real AS paths.

AS11580Toward the internet core
Upstream graph for AS11580: 4 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS11580Island Networks L…This networkAS23520Columbus Networks…AS30689FLOWAS1299Arelion (fka. Tel…AS6830Liberty Global Eu…

Networks observed one and two hops upstream of AS11580 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS11580
NetworkCountryRelationshipPathsVantage pts
AS23520Columbus Networks USA, Inc.USPeer46276
AS30689FLOWJMPeer7575

Prefixes

The largest blocks AS11580 originates, widest first.

Largest prefixes originated by AS11580
PrefixAddressesVisibility
64.112.16.0/221k76/76
74.116.56.0/221k75/76
205.164.204.0/221k75/76
72.252.24.0/2425675/76
74.116.56.0/2425675/76
74.116.57.0/2425610/76
74.116.58.0/2425675/76
74.116.59.0/2425675/76
162.254.243.0/242561/76

Routing health

How AS11580's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid11.1%1
  • No ROA88.9%8

Propagation

  • Globally propagated90% of full-feed peers or more77.8%7
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%22.2%2

Prefix sizes

IPv4 — 9 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS11580 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.